Texas Instruments 990 Operation Manual page 177

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945255-9701
.PP,MS287-8
. PP,GO
Change the PROM.
.PS,MS287-C
. PP,GO
Load standard memory configuration MS287-8
with initial bit displacement equal to 8.
Program PROM III .
Load standard memory configuration MS287-C
with initial bit displacement equal to
C
16 .
Program PROM IV .
7.7.2 EXAMPLE 2. Program a 32 by 8 PROM from a 16 word block of memory beginning at
memory address 40
16 ,
Assume that the CRU base address is lAO
I6 •
Position the Standard Control Information Cassette. Refer to figure 7-3 .
. PS,S288,MS288A Standard Control Information for ROM/PROM
configuration S288. Standard Control Information
for memory configuration MS288A. This
configuration has an initial displacement
of
°
with a bit increment of 8 bits, and
a bit string width of 8 .
. PP,MB,40,5F Beginning memory address 40
16 ,
Ending
memory address SF
16'
.PP,CS,1AO CRU ROM interface base address lAO
I6 •
. PP,TS,O,O, 1, 1 Set toggle to program PROM and compare .
. PP,GO
7.7.3 EXAMPLE 3. Load the most significant bytes of a 256 word block of memory beginning
at memory address
°
from a 256 by 8 PROM.
Assume that the CRU base address is 120
16 ,
Refer to figure 7-4.
7-27
Digital Systems Division